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T
ECHNICAL
Q
UICK
R
EFERENCE
122
&A3
Protocol indicators
added
LAPM/MNP/NONE
(error control) and
V42bis/MNP5 (data
compression)
&Bn
Manages modem’s serial
port rate.
&B0
Variable, follows
connection rate
&B1
Fixed serial port rate
&B2
Fixed in ARQ mode,
variable in non-ARQ
mode
&Cn
Controls Carrier Detect
(CD) signal.
&C0
CD override
&C1
Normal CD operations
&Dn
Controls Data Terminal
Ready (DTR) operations.
&D0
DTR override
&D1
DTR toggle causes
online Command
mode
&D2
Normal DTR
operations
&D3
Resets on receipt of
DTR
&Fn
Loads a read-only (non-
programmable) factory
configuration.
&F0
Generic template
&F1
Hardware flow control
template
&F2
Software flow control
template